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author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-12-03 23:23:50 +0000 |
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committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-12-03 23:23:50 +0000 |
commit | fc6374439edf2f74da4026f4cea8e341d092be5c (patch) | |
tree | bb000dd3e82cff7fae77dcf0f9d9930922e4e1f4 /include/llvm/CodeGen/VirtRegMap.h | |
parent | ade047463fd6e0fbb447145eb06015b8e7836482 (diff) | |
download | external_llvm-fc6374439edf2f74da4026f4cea8e341d092be5c.zip external_llvm-fc6374439edf2f74da4026f4cea8e341d092be5c.tar.gz external_llvm-fc6374439edf2f74da4026f4cea8e341d092be5c.tar.bz2 |
Add VirtRegMap::hasKnownPreference().
Virtual registers with a known preferred register are prioritized by
RAGreedy. This function makes the condition explicit without depending
on getRegAllocPref().
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169179 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/llvm/CodeGen/VirtRegMap.h')
-rw-r--r-- | include/llvm/CodeGen/VirtRegMap.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/llvm/CodeGen/VirtRegMap.h b/include/llvm/CodeGen/VirtRegMap.h index ebf42a3..5fe6297 100644 --- a/include/llvm/CodeGen/VirtRegMap.h +++ b/include/llvm/CodeGen/VirtRegMap.h @@ -134,6 +134,11 @@ namespace llvm { return getPhys(VirtReg) == getRegAllocPref(VirtReg); } + /// @brief returns true if VirtReg has a known preferred register. + /// This returns false if VirtReg has a preference that is a virtual + /// register that hasn't been assigned yet. + bool hasKnownPreference(unsigned VirtReg); + /// @brief records virtReg is a split live interval from SReg. void setIsSplitFromReg(unsigned virtReg, unsigned SReg) { Virt2SplitMap[virtReg] = SReg; |